Hereditary cancers: from discovery to intervention

Area of Science:

• Oncology
• Genetics
• Cancer Research

Background:

• Hereditary cancers of the breast, ovary, and colon are common, fatal, and highly heritable.
• Significant progress has been made in identifying genes associated with hereditary cancer predisposition.
• Understanding the molecular basis of these cancers is crucial for developing effective prevention and treatment strategies.

Purpose of the Study:

• To review the current understanding of hereditary cancers of the breast, ovary, and colon.
• To discuss the role of gene mutations in cancer predisposition.
• To explore the potential for intermediate endpoints in cancer prevention research.

Main Methods:

• Review of cloned genes and mapped genetic loci associated with hereditary cancers.
• Discussion of molecular details of hereditary colon cancer, including APC gene and DNA mismatch repair genes.
• Exploration of the concept of intermediate endpoints for monitoring preventive measures.

Main Results:

• Four genes predisposing to hereditary breast, ovarian, and colon cancers have been cloned, with another mapped.
• The APC gene in familial polyposis coli leads to polyps with low malignant transformation probability, offering an intermediate endpoint.
• Mutations in DNA mismatch repair genes accelerate polyp-to-cancer transformation in hereditary nonpolyposis colon cancer.

Conclusions:

• The identification of specific genes and molecular pathways provides a foundation for understanding hereditary cancer risk.
• The concept of intermediate endpoints, as exemplified in colon cancer, could be valuable for breast cancer research.
• Further research into prevention and treatment strategies is essential, contingent on the availability of promising measures for individuals at high risk.